I made the beam engine myself. The beam and other green parts are made from the case of an old VCR, and the column is an old towel rack. The flywheel is the only commercially-made part.
The traction engine came to me advertised as having a new silver-soldered boiler. That was a lie, and I ended up making a real silver-soldered boiler as well as re-working all of the piping and the throttle plus lubricator system. Worth it, though, as it runs fine now....